Lemon Sponge Cake With Potato Starch

Ingredients

• 6 eggs, separated
• 9 oz granulated sugar
• 4 oz flour
• 2 oz potato starch
• Lemon peel, grated
• Cold butter, for greasing
• Powdered sugar mixed with flour, for sprinkling

Method

1. 1 Beat egg yolks with sugar and one tablespoon of flour mixture for 30 minutes using a ladle.
2. 2 Beat egg whites until firm. Fold whites into yolk mixture slowly.
3. 3 Sift remaining flour and potato starch over the batter and fold in gently.
4. 4 Pour batter into a greased tin to 1.5-inch thickness. Sprinkle with powdered sugar and flour mix.
5. 5 Bake in a moderate oven (350°F) until set and golden.